The present invention is related to a leaf spring system allowing damage assessment in leaf springs (2) used in the motor vehicles and to a production method of the same. The system of the present invention particularly comprises a leaf spring (2) which comprises a series of fiber fabric layers exposed to polymeric resin with electrically conductive nanoparticles, therefore providing electrical conductivity with nanoparticle matrices along the entire fiber fabric layers; a current generator (6) in order for passage of electrical current throughout said leaf spring (2); a control unit (7) which is connected to both ends of said leaf spring (2) via conductors and measuring the resistance throughout the spring (2) and generating an electrical signal depending on the resistance or the current of the circuit; and a warning means in order to convert the electrical signal generated by said control unit (7) to a warning signal.